Now that would be a great pseudo-documentary. It could be presented as a Time Team episode where they're digging away in various trenches, and then one of them finds a strange piece of metal. Somebody takes it away to analyse in their tent whilst the dig slowly continues.

Then she rushes back to tell them the fragment of metal is some weird unknown titanium alloy, and it makes no sense it would be in a site of 3,000 year old dirt!

Then, in a separate trench they unearth an escape pod from an alien vessel.